Attention:What I show here as to the adjustments of a Cutout or Regulator is what I have had success with in the past. The experts will tell you that only those with the training and equipment should attempt to adjust them. Also it is the opinion of some experts that if there is a malfunction, the unit probably has reached it’s expected life and should be replaced.

This may be true but we all can’t afford to replace parts at will. I have had good luck with cleaning and adjusting them. One thing to remember though, my tractors see only limited use. If you run yours on a regular basis the cleaning and adjustment may not last long.

The Cutout Test and Regulator Test as I show them is a bench type test. It can be done while mounted on your Cub, but all wires should be removed. Remember to insulate them so they don’t short out. After making your adjustments and it seems to be working, at the very least, you should check the voltage at the battery and check the charge rate on the AMP gauge to see if it’s over charging. Also, with every thing off, remember to check to make sure it isn’t discharging.

If the points are burnt they will need to be filed and then cleaned. When adjusting by the tabs keep the points as parallel as possible. I have bent them offset though if they were badly burnt on an edge.

Do not attempt to adjust them while the engine is running or there is battery voltage present.

Edit: Thanks to Bus Driver for pointing out that after the cover has been installed they need to be rechecked. They are heat sensitive.Edit 2: Thanks to beaconlight for this info. The cover on affects the magnetic field is why it affects when installed.The first two photos show how to check a Cutout and the cutout relay of a Regulator.

The other photos show some of the possible ways to adjust them (depending how they are built) in an attempt to get them working.

Remember if you see some thing wrong let me know.

Last edited by birddog on Mon Dec 31, 2012 10:10 pm, edited 2 times in total.

I like this one a lot. Going to be a lot easier to understand now. Excellent work and I am sure a lot of our members are going to be really happy that you took the time to do this for us. I know I certainly appreciate it Thank you

Time at this moment did not permit reading all the accompanying text carefully. Voltage regulators are affected by the cover on the regulator. So after adjustments, it is very important to replace the cover and verify operating characteristics with the cover secured in place. I have had very few occasions where voltage regulators needed adjusting.

I just wanted to bump this post to the top as I really found it helpful in troubleshooting my voltage regulator... Might be a good addition to the How To forum for the electrical system. Mark, I really appreciate your post!!

Good post.When the cover is installed, make sure the gasket is in place at the base and the two screws have the nylon washers. The cover has to be isolated from ground or it will effect the coils. This prevents the cover from looking like a "shorted turn" to the coils.Gerry